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Programming and testing the board using AT commands

Hello, I need to upload the SEGGER script to FANSTEL EV-BT840 (832)-V4 via nRF52832, but there is something wrong with the connection. In my project, it is needed to use beaconing mode and the script is successfully running, the device name and all the relevant information can be seen in the BLE scanner and other mobile applications. But when I try to follow the rules about testing FANSTEL using AT commands, I faced communication issues.

According to the following programming tutorial, hex files must be programmed for SoftDevice, Application, and Bootloader on nRF GO Studio, and then AT commands must be sent using DockLight. But here, COM port cannot be found and I am not able to receive anything from the board. I urgently need to upload the beacon mode script to FASNTEL and check if it is working or not. Please, help me ASAP.

static1.squarespace.com/.../Using AT Commands on Bluetooth 5.pdf

Best regards,
Ulvi

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